For more than a century, popular culture has trained us to picture extraterrestrials as bug-eyed, bipedal “little green men” ...

Finding bacteria in extreme environments, like at thermal ocean vents or in the sulfur pools at Yellowstone, isn't all that novel. In 1991, remote-control robots brought out samples of pitch-black ...

Green is a sign of life on Earth, but other habitable planets could be teeming with purple microbes that we should be able to detect with telescopes. Reading time 2 minutes In a little more than 30 ...

A bacterium that can not only withstand but thrive on arsenic has been discovered by NASA scientists at the bottom of a Californian volcanic lake. That the bacteria can live on such a toxic substance ...